Hello @Stelio,
I have tested the issue on my test site and it appears to be working correctly. You can check it in the private content area of this topic.
It is likely that the issue is caused by a conflict with a third-party plugin. We suggest disabling all third-party plugins (including cache plugins) that are not included with XStore (https://xstore.helpscoutdocs.com/article/36-included-plugins), clearing the browser cache, and then checking again.
We can also see that you have activated the server cache on your site. We recommend contacting your hosting provider to flush the server cache completely and then turn it off while you are in the development process.
If the issue persists, please keep all third-party plugins deactivated on your site and grant permission to debug your site, which includes deactivating all third-party plugins and on-site customizations. This will allow us to further investigate and assist you accordingly.
Please note that you should take a complete backup of your site before making any changes.
Best Regards,
8Themes Team